colSds {wrMisc} | R Documentation |
sd for each column
Description
This function is speed optimized sd
per column of a matrix or data.frame and treats each column as independent set of data for sd (equiv to apply(dat,2,sd)
).
NAs are ignored from data. Speed improvements may be seen at more than 100 columns
Usage
colSds(dat, silent = FALSE, debug = FALSE, callFrom = NULL)
Arguments
dat |
matrix (or data.frame) with numeric values (may contain NAs which will be ignored) |
silent |
(logical) suppress messages |
debug |
(logical) additional messages for debugging |
callFrom |
(character) allows easier tracking of messages produced |
Value
numeric vector of sd values
See Also
Examples
set.seed(2016); dat1 <- matrix(c(runif(200) +rep(1:10,20)), ncol=10)
colSds(dat1)
[Package wrMisc version 1.15.4 Index]